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plugins/mod_storage_memory.lua @ 9727:9a35ae935390
util.table: Add test for create()
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 23 Dec 2018 15:01:37 +0100 |
parent | 9609:1dfcea523200 |
child | 9783:4c91afc43639 |
child | 9832:96d9c121547b |
rev | line source |
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1 local serialize = require "util.serialization".serialize; |
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2 local array = require "util.array"; |
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3 local envload = require "util.envload".envload; |
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4 local st = require "util.stanza"; |
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5 local is_stanza = st.is_stanza or function (s) return getmetatable(s) == st.stanza_mt end |
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6 |
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7 local auto_purge_enabled = module:get_option_boolean("storage_memory_temporary", false); |
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8 local auto_purge_stores = module:get_option_set("storage_memory_temporary_stores", {}); |
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9 |
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10 local memory = setmetatable({}, { |
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11 __index = function(t, k) |
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12 local store = module:shared(k) |
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13 t[k] = store; |
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14 return store; |
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15 end |
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16 }); |
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17 |
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18 local function NULL() return nil end |
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19 |
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20 local function _purge_store(self, username) |
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21 self.store[username or NULL] = nil; |
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22 return true; |
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23 end |
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24 |
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25 local keyval_store = {}; |
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26 keyval_store.__index = keyval_store; |
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27 |
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28 function keyval_store:get(username) |
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29 return (self.store[username or NULL] or NULL)(); |
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30 end |
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31 |
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32 function keyval_store:set(username, data) |
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33 if data ~= nil then |
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34 data = envload("return "..serialize(data), "=(data)", {}); |
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35 end |
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36 self.store[username or NULL] = data; |
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37 return true; |
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38 end |
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39 |
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40 keyval_store.purge = _purge_store; |
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41 |
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42 local archive_store = {}; |
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43 archive_store.__index = archive_store; |
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44 |
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45 function archive_store:append(username, key, value, when, with) |
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46 if is_stanza(value) then |
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47 value = st.preserialize(value); |
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48 value = envload("return xml"..serialize(value), "=(stanza)", { xml = st.deserialize }) |
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49 else |
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50 value = envload("return "..serialize(value), "=(data)", {}); |
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51 end |
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52 local a = self.store[username or NULL]; |
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53 if not a then |
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54 a = {}; |
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55 self.store[username or NULL] = a; |
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56 end |
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57 local v = { key = key, when = when, with = with, value = value }; |
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58 if not key then |
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59 key = tostring(a):match"%x+$"..tostring(v):match"%x+$"; |
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60 v.key = key; |
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61 end |
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62 if a[key] then |
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63 table.remove(a, a[key]); |
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64 end |
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65 local i = #a+1; |
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66 a[i] = v; |
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67 a[key] = i; |
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68 return key; |
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69 end |
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70 |
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71 local function archive_iter (a, start, stop, step, limit, when_start, when_end, match_with) |
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72 local item, when, with; |
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73 local count = 0; |
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74 coroutine.yield(true); -- Ready |
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75 for i = start, stop, step do |
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76 item = a[i]; |
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77 when, with = item.when, item.with; |
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78 if when >= when_start and when_end >= when and (not match_with or match_with == with) then |
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79 coroutine.yield(item.key, item.value(), when, with); |
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80 count = count + 1; |
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81 if limit and count >= limit then return end |
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82 end |
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83 end |
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84 end |
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85 |
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86 function archive_store:find(username, query) |
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87 local a = self.store[username or NULL] or {}; |
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88 local start, stop, step = 1, #a, 1; |
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89 local qstart, qend, qwith = -math.huge, math.huge; |
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90 local limit; |
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91 if query then |
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92 module:log("debug", "query included") |
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93 if query.reverse then |
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94 start, stop, step = stop, start, -1; |
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95 if query.before then |
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96 start = a[query.before]; |
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97 end |
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98 elseif query.after then |
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99 start = a[query.after]; |
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100 end |
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101 limit = query.limit; |
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102 qstart = query.start or qstart; |
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103 qend = query["end"] or qend; |
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104 qwith = query.with; |
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105 end |
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106 if not start then return nil, "invalid-key"; end |
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107 local iter = coroutine.wrap(archive_iter); |
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108 iter(a, start, stop, step, limit, qstart, qend, qwith); |
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109 return iter; |
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110 end |
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111 |
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112 function archive_store:delete(username, query) |
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113 if not query or next(query) == nil then |
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114 self.store[username or NULL] = nil; |
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115 return true; |
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116 end |
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117 local items = self.store[username or NULL]; |
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118 if not items then |
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119 -- Store is empty |
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120 return 0; |
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121 end |
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122 items = array(items); |
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123 local count_before = #items; |
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124 if query then |
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125 if query.key then |
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126 items:filter(function (item) |
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127 return item.key ~= query.key; |
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128 end); |
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129 end |
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130 if query.with then |
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131 items:filter(function (item) |
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132 return item.with ~= query.with; |
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133 end); |
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134 end |
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135 if query.start then |
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136 items:filter(function (item) |
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137 return item.when < query.start; |
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138 end); |
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139 end |
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140 if query["end"] then |
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141 items:filter(function (item) |
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142 return item.when > query["end"]; |
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143 end); |
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144 end |
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145 if query.truncate and #items > query.truncate then |
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146 if query.reverse then |
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147 -- Before: { 1, 2, 3, 4, 5, } |
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148 -- After: { 1, 2, 3 } |
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149 for i = #items, query.truncate + 1, -1 do |
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150 items[i] = nil; |
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151 end |
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152 else |
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153 -- Before: { 1, 2, 3, 4, 5, } |
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154 -- After: { 3, 4, 5 } |
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155 local offset = #items - query.truncate; |
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156 for i = 1, #items do |
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157 items[i] = items[i+offset]; |
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158 end |
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159 end |
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160 end |
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161 end |
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162 local count = count_before - #items; |
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163 if count == 0 then |
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164 return 0; -- No changes, skip write |
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165 end |
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166 setmetatable(items, nil); |
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167 |
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168 do -- re-index by key |
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169 for k in pairs(items) do |
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170 if type(k) == "string" then |
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171 items[k] = nil; |
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172 end |
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173 end |
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174 |
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175 for i = 1, #items do |
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176 items[ items[i].key ] = i; |
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177 end |
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178 end |
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179 |
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180 return count; |
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181 end |
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182 |
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183 archive_store.purge = _purge_store; |
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184 |
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185 local stores = { |
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186 keyval = keyval_store; |
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187 archive = archive_store; |
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188 } |
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189 |
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190 local driver = {}; |
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191 |
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192 function driver:open(store, typ) -- luacheck: ignore 212/self |
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193 local store_mt = stores[typ or "keyval"]; |
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194 if store_mt then |
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195 return setmetatable({ store = memory[store] }, store_mt); |
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196 end |
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197 return nil, "unsupported-store"; |
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198 end |
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199 |
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200 function driver:purge(user) -- luacheck: ignore 212/self |
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201 for _, store in pairs(memory) do |
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202 store[user] = nil; |
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203 end |
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204 end |
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205 |
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206 if auto_purge_enabled then |
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207 module:hook("resource-unbind", function (event) |
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208 local user_bare_jid = event.session.username.."@"..event.session.host; |
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209 if not prosody.bare_sessions[user_bare_jid] then -- User went offline |
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210 module:log("debug", "Clearing store for offline user %s", user_bare_jid); |
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211 local f, s, v; |
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212 if auto_purge_stores:empty() then |
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213 f, s, v = pairs(memory); |
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214 else |
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215 f, s, v = auto_purge_stores:items(); |
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216 end |
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217 |
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218 for store_name in f, s, v do |
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219 if memory[store_name] then |
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220 memory[store_name][event.session.username] = nil; |
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221 end |
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222 end |
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223 end |
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224 end); |
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225 end |
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226 |
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227 module:provides("storage", driver); |